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A Simultaneous Improvement in $CO_2$ Flux and $CO_2/N_2$ Separation Factor of Sodium-type FAU Zeolite Membranes through 13X Zeolite Beads Embedding  

Cho, Churl-Hee (Nano Materials Research Center, Korea Institute of Energy Research)
Yeo, Jeong-Gu (Nano Materials Research Center, Korea Institute of Energy Research)
Ahn, Young-Soo (Nano Materials Research Center, Korea Institute of Energy Research)
Han, Moon-Hee (Nano Materials Research Center, Korea Institute of Energy Research)
Moon, Jong-Ho (Department of Chemical Engineering, Yonsei University)
Lee, Chang-Ha (Department of Chemical Engineering, Yonsei University)
Publication Information
Membrane Journal / v.17, no.3, 2007 , pp. 269-275 More about this Journal
Abstract
Sodium type faujasite(FAU) zeolite membranes with a thickness of 5${\mu}m$ and a Si/Al molar ratio of 1.5 were prepared by the secondary growth process. The $CO_2/N_2$ separation in the vacuum mode was investigated at $30^{\circ}C$ for an equimolar $CO_2-N_2$ mixed gas before and after embedding 13X zeolite beads in the permeate side. The embedded 13X zeolite beads improved both $CO_2$ permeance and $CO_2/N_2$ separation factor, simultaneously. The phenomenon was explained by an increment in the $CO_2$ desorption rate at the FAU zeolite/$\alpha-Al_2O_3$ phase boundary due to an enhanced $CO_2$ escaping through the pore channels of the $\alpha-Al_2O_3$ support layer. In the present paper, it will be emphasized that a hybridization of a membrane with an adsorbent can provide a key to break through the trade-off between permeance and separation factor, generally shown in a membrane separation.
Keywords
FAU zeolite membrane; 13X zeolite bead; hybridization; trade-off bewteen permeance and separation factor;
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Times Cited By KSCI : 1  (Citation Analysis)
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